How is the weight of an animal’s brain related to the weight of its body? Researchers collected data on the brain weight (in grams) and body weight (in kilograms) for 96 species of mammals. The following figure is a scatterplot of the logarithm of brain weight against the logarithm of body weight for all 96 species. The least-squares regression line for the transformed data is

Based on footprints and some other sketchy evidence, some people believe that a large ape-like animal, called Sasquatch or Bigfoot, lives in the Pacific Northwest. Bigfoot’s weight is estimated to be about 127 kilograms (kg). How big do you expect Bigfoot’s brain to be?

Transcribed Image Text:

log y^=1.01+0.72 log xlog y = 1.01 + 0.72 log r 3 1 0. 1. 2 3 log (body weight) log (brain weight) 2.